Explosive-engine.



' R. :NESSLER.

EXPLOSIVE ENGINE. APPLIOATION FILED AUG. 17, 1908.

923,069. Patented May 25, 1909.

'REINHARDT NEssLnR, OF EAST OAKLAND, cALIFoRNIA.

EXPLQSIVE-ENYGINE. i 2

" Specification of Letters Patent.

Patented May 25, 1909.

Application fiI edAugust 7, 1908. swarm. 448,914.

i To all whom it magz concern:

Be it known that I, REINHARDT Nnssnaa,

a citizen of the United States, residing at Engines East Oakland, in the county of Alameda and State of California, have invented a new and useful Improvement in Explosiveof which the following 1s a specificationic l This invention is an improvement upon two cycle engines in which the-crank chamberis employed as a compression chamber, and the object of the invention is tosccure a more economical use of the explosive gases by compressing them in the explosion chamher by means of a peculiar construction-"of the 'plston anda special arrangement of the ports.

The invention consists in the novel fea-' tures of construction hereinafter described,

pointed out in the claims and shown in the accompanying drawings, in which:

Figure 1 isa vertical section through-the engine. Fi is a vertical sectlon'taken at right angles to Fig. 1.

In these drawings 1 represents an upright cylinder provided through its upper half, m

which the explosion chamber is located, with a water jacket 2, and surrounded through its lower half by a as and air receiver A pipe 4 leads from the carburetor, not shown, to said receiver, the pipe being provided with a valve'casing-f) in which is the usual form of spring pressed check valve The i cylinder 1 rests upon. a suitable base 6 which also forms a housing for the cranked portion 6 ofa drive shaft, to said crank porlowest-position, as shown in. the drawings, -The piston 8' carries a dome 9 which extends I .50'into a second cylindricalpiston' 10,'having tion a pitman-T being connected. At its upper end this pitman is pivoted Within a cylindrical, downwardly open piston 8 WlllCllworks in the lower portion of the cylinder 1 which portion-is of a diameter slightly less. than the remainder of the cylinder.

Where the diameter of the cylinder changes w an offset is formed which will be referred to hereafter, and which'ofiset is substantially in a horizontal plane with the upper portlon of the piston 8 when the latter is in its a non-perforate top, and the two pistons are connected together-by a web 11- secured to the dome 9 The above construction forms a compound piston and there is no direct communication between the interior of thepiston' 10 and the exterior-air, Ports 12-are formed in theoffset portion, above referred to and afford communication between the receiving chamber 3 and the interior of the piston 10'. A. slot 13 in the piston 10 communicates, when the piston is in its lowest position with a by-pass 14 which leads into the top of the cylinder 1, the upper end of said by-pass belng controlled'by a. spring pressed check valve 15. A spark plug 16 extends into the upper end of the cylinder 1, and an exhaust port 17 is formed in one side of-said cylinder, said port being at the lower limit of the explosionchamber.

The operation of the engine is as follows :-As the piston 10 moves upward it acts as a suction plunger and, drawing mixed air and gas from the carbureter through the pipe -1, -fills the receiver '3. and also the interior ofthe iston 10, and upon the down coinpletion of the down stroke'the' slot, or

port, l3'registers'withthe byass 14 and the compressed charge enters t e explosion chamber formed by the upper part of the the second upstroke o the piston, and is. then exploded and acts against the piston driving it on its down stroke, and upon the end of thisv down stroke a new char e will enter by way of the by-pass and wi 1 drive out the products of combustion remaining from the previous explosion, through the exhaust port 17, and will be in turn compressed on the next upstroke and then exploded. This operation will "be continued during running of the engine.

What I. claim is: v

1.' An engine of the kind described coniprising a cylinder having an oflt'set portion having ports therein,- an .air and gas re.

, ceiver inclosin .said o'flset portion, a hollow piston open a jacent one end and slotted on one side, a by-pass communicating with saidslot whenthe piston is atthe end ofa down stroke, sald. by-pass opening into the upper cylinder, where it is a ain' compressed on end ofithe cylinder, and meansfor admitting an explosive mixture into the receiver,

the ports of the offset portion admitting the,

mixture from lZ-lJG'I'GQGIVGI tO the piston.-

2. In an englne of the kind'described, a cylinder,' the lower portion of said cylinder being reduced in diameter, an explosive mixtnre receiver surrounding said'reduced port1on,a piston sliding in said portion, a dome carried by the piston, a second .piston inclosing said dome and openv around :the end 4 '15 a stroke this 0 arge is compressed. -At the which said dome enters, the cylinder having ports aifording communication between the receiver and the interior of said second piston, a bypass leading from the side of the cylinder to the upper end of the cylinder and a spark plug extending into said end, the second piston being slotted to register with the by-pass at the end of each alternate stroke.

3. In a gas engine, an engine cylinder having laterally opening inlet orts andan exhaust port, a by-pass leading rom the side of the cylinder to the explosion end, and a compound. piston working in said cylinder, said plston comprising upper and lower downwardly open cylinders, the lower cylinpiston.

- REINHARDT NESSLER. Witnesses T. F. NEUWIRTH, J OHN PARKER. 

